Pulverizing mill



Dec. 26, 1944; A. PEAKE 2,365,904

PULVERI ZING MILL Filed 001;. 24, 1942 2 Sheets-Sheet 1 INVENTOR Au]? Peaks HTTYS Dec. 26, 1944. J PEAKE 2,365,904

' PULVERIZING MILL 7 Filed 001:. 24, 1942 2 Sheets-Sheet 2 INVENTOR H. .1 Peaks /7 TTYS Patented Dec. 26, 1944 Ptni'vemzme MILL Abner J. Peake, stocltomabdlii'e Application ottoberaa 19 i2fSe'1lai 41' Claiiiis2= This imvemian lr elates to pulverizingmills of that type which names a vertical rotarydriven pulverizing mu; and which is particularly de si'gnedto. pulveri'ze, ore and the lilge from three-- eighths inch s'i'ze downward.

One object. is tolprevideian improved means for adjusting the setting ofl'the-roll while in op ration. so as to. provide for. different degreesoffihehSS Offluliriiiihgt or 170' compensate forwe'ar as it dccurs.

further object Tis. to provide an improved arrangemen whereby fluid-under. pressure may besufiiiliedlto the lb'wer en'd'ofthe mill chamber, with" the Vertical adj iistiIieI'ltofth'e' mill rbttrrrom below and clear of the chamber; 7

Aifui'tl'i'er Eject or the inventibn is 'to rovide a: simple andhnexpens ve "device, and yet the:

These and-other tweet-s r accomplish 7 means or such "istru'c'tur'efandrelative arrange,

ent or-ipartsas"wnrrunyappea by a perusal of thefollowing'specifitatiomahd claims; t the drawings simi ar or" refer ence" indloatecorlespdh'ding in" the several views: 1.

Figure 1 a sectional elevation" o'f iinproved-mini v F ure 2""is atopplauvie'w .dftlie' sar'iie'. Figure-*3 aqrag'mentaryenlarged cross sec"- tionowth'edirle "3-*3"of Fi':. 1.

Figure 4 is atop plan ofthe bottom 1 o11"e'i'-'- bearing "block" detached:

Referring new morepartrcmari 'to tnechafl acters" of reference on the drawings; "the rnill includes a vertiaiuiverizmg chamber r o'fin" verted' frusto' conica'lf shape; defined about" its" tidal axis A -cf the' znillj Thelinear'is' supported betweenxand securing the liner immaee; The

base is -embeddedin' a heavy concrete bed 5, which has a relatively large opening 6 some ,distance below the chamber and base. The base below the liner is of reduced size, and is-square ,cr rectangular in form to provide a guide well 1 for a vertically adjustable block 8. This block is adjustably supported by a heavy depending stem 9 which projects across the opening 6 and is threaded at its lower end in a sleeve IIJ secured in the bed below said opening. The stem may be rotated to raise or lower the block by an enlarged head II or the like on the stem within the opening 6, and is locked against undesired movement bya nut I2 immediately above "ljo; The stem passes and 13' seam-ewe beam greater taper errhepetn n niat 'of' the liner-"21 ,.This' r011 'fiiay be ra d with a remtvablnare sleet/e431 projects upwardly from tirertllaxiaiii tli reor the in Fig. '1, and

1 H 'atingthestein"BWhich iiiciirectiy suppoits-"trieroll; as'win be evident: The hub 22 is turnably amme in "a" 'sin" rounding *Bdfitfffl" npportedfrbiri Radial legs" :25 which depend tow riidconhe'ctioriwith' the base 3 at the top end with the bed 5,1 inflsurround- H the-upper ena of the chaiiibrg fl'ah a zs' rsengageu" b3" a kievewiii or! d-Journamd tn triefboss" and conneefied a puny 2*!" ortlie like, Bywhich" said pinion is driven at a suitable operating speed.

The boss is covered by a cap 28 to which an oil feed pipe 29 is connected so that the gears and adjacent parts, including hub 22, will be suitably lubricated. The stem 20 below the-boss has an oil shed flange 30 thereabout which overhangs and drains into an endless trough 3| of greater diameter than the hub 22 and which is supported by the legs 25 some distance above the roll. Oil from the trough flows into a pipe 32 from which 55 it may be re-circulated into the cap.

while the hub 22 is concentriti"with tile-axis] circumference of the Supported on the base on top thereof is an endless trough 33, whose radially innermost side is close to the liner 2, and is relatively shallow compared with its outer side, as shown. A cover 34, orificed for the stem 20, is supported by said outermost side of the trough, and one or more carry-off chutes 35 projects radially out from the trough 33.

A hopper 36 for the ore to be pulverized is disposed above the bed5' and communicates with the chamber I on one side thereof atthe bottom by a passage 31 through the bed, and which of course extends through the base 3 and liner 2 also.

In operation, water under pressure is fed into the water passes up into the chamber I through the passages IS in the form of jets. These jets force the material upwardly in the chamber I and with the rotation of the roll, and due to the constantly decreasing width of the space 'in. the chamber between the roll andliner, the material is gradually subjected to a crushingor pulverizing action, which of course becomes greatest at the rim of the liner .2. The pulverized material and water, as they overflow from the chamber, pass or are thrown into the trough33, from which they fiow'into the chutes 35 which carry'ofi the material for further treatment. Since the greatest width of the chamber I' is 'at the bottom, and since the ore naturally tends to fall of itself, the mill roll cannot choke c-r jam even if the water pressure fails while the ore is still being fed.

The particular means employed for supporting and adjusting the roll enables an adjustment to be made while the mill'is operating, and the fineness of the pulverizing .actio'ncan'be seen and accordingly controlled. without any guesswork or any repeated stopping and starting of the mill being necessary. T

' The stem being turnable in the driving gear, the roll is not forcefully rotated while it'gyrates. However, it is free and will rotate by the frictional contact set up between theroll and theme as the latter is held in a pulverijz'ing' grip.

' From the foregoing description it will'be readily seen that I have produced such av device as substantially fulfills the objects of the invention as set forth herein. M

While thisspecification sets forth'in detailthe present and preferred construction of the device, still in practice such deviations from such detail may be resortedtoas' do not forma departure from the spirit of the invention, as defined by the appended claims. 'T

Having thus described m invention, what I claim as new 'and useful anddesire to secure by Letters Patent is: j

1. A pulverizing'mill including means forming an upstanding chamber of circular form in plan and having an upwardly flaring side wall, a rotary pulverizing member in said chamber of smaller diameter than the chamber and substantially engaging the chamber wall at one point only at the top of the latter, means to feed material to the chamber adjacent its lower end, and separate means to supply fluid under pressure to the chamber adjacent the bottom thereof.

2. A pulverizing mill including means forming an upstanding chamber of circular form in plan and having a. upwardly flaring side wall, a rotary pulverizing member in said chamber of smaller diameter than the chamber and having a taper form of greater vertical angularity than that of the flare of the chamber, means mounting the member so as to be substantially tangent to 'the chamber wall at one point at the top of the latter, means to feed material to the chamber, means to drive the member from itsupper end, a bearing block for the lower end of the member mounted for vertical movement in connection with the chamber below the member, a turnable stem depending from the block and a fixed sleeve below the block in which the lower end of the stem is threaded and spaced from the block to leave a portion of the stem exposed for manipulation.

3. A pulverizing mill including means forming an upstanding'chamber of circular form in plan and having an upwardly flaring side wall, a rotary pulverizing member in said chamber of smaller diameter than the chamber and having a taper form of greater vertical angularity than that of the flare of the chamber, means mounting the member so as to be substantially tangent to the chamber wall at one point at the top of the latter, means to feed material to the chamber, means to drive the member from its upper end, a bearing block for the lower end of the member mounted for vertical movement in connection with the chamber below the member, a well in which said block is slideable, a vertically adjustabe stem depending from and supporting the block, a packing gland about the stem forming a closure for the lower end of the well, and a fluid pressure conduit leading to the last named chamber below the block, the latter having fluid passages therethrough.

4. A pulverizing mill comprising means forming a vertical pulverizing chamber, a rotary pulverizing member in the chamber cooperating with the inner wall thereof, means to rotate the member from above the chamber, means to feed material into the chamber, a well below and communicating with the chamber, means to feed fluid under pressure into the well, means supporting the member for vertical adjustment and including a supporting stem depending through the bottom of the well, a fixed support for the lower end of the stem and in which said stem is vertically adjustable and a pressure-tight guide for the stem below the member and sealing the lower end of the well.

ABNER J. PEAKE. 

